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ID:36345512
大小:3.47 MB
页数:77页
时间:2019-05-09
《SCTP多流优先级的研究与实现》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、北京交通大学硕士学位论文SCTP多流优先级的研究与实现姓名:申王睿申请学位级别:硕士专业:通信与信息系统指导教师:周华春20080601北京交通大学硕+学位论文ABSTRACTABSTRACT:Withthesteadyimprovementofhardwaretechnologyandnetworkcommunicationtechnology,endusersareaccustomedtoobtainingthemultimedianetworkservicesthroughtheInternet,likeWebbrowsing,instantmessaging,videochatetc
2、.However,theseservicesareoftenbandwidth-intensive,andneededtOgetvariousdatafromserverinasingleservice.However,thenetworkcouldn’tprovideenoughbandwidthforallkindsofdatainthecaseoflowbandwidth,SOthenetworkserverneedawaytotransmitmultipledatainparallel,whichalsoeffectivelyrespondtoperiodsofinsufficien
3、tbandwidth.SCTPisareliable,connection-orientiedtransportprotoc01.Itsmultihomingandmultistreamingareverysuitableforthesetypesofmultimedianetworkservices.BasedontheanalysisofthesourcecodeofSCTPinLinuxkernel,thispaperpurposesanoptimizationtoSCTPforhighdatatransferdelayinperiodsoflowbandwidthavailable,
4、andimplementit.BasedonthemultistreamingofSCTP,theschemeassignapriorityvaluetoeachlogicalstreaminSCPTassociation,andthenputthedataofprioritizedlogicalstreamtocorrespondingprioritizedoutputqueue.Finally,weschedulethesequeueswithschedulingalgorithms,whichcouldensurethetransmissionofthemoreimportantdat
5、awithlowerdelaywhenlowbandwidthisavailable.InordertomeetthedifferentrequirementsofapplicationsforprioritizedSCTPstreams,thepaperimplementtwooptionalschedulingalgorithm:prioritizedqueueschedulingandweightedqueuealgorithm.InordertOverifytheeffectivenessandfeasibilityofthescheme,thispaperalsoimplement
6、akindofWebbrowsingservicebasedonprioritizedSCTPstreams.Forthat,Ididtwojob.Fistofall,ImodifiedthesourecodeofApacheandFirefoxtoletthemcommunicatewitheachotherinSCTP,andusemultithreadingtoimprovetheperformanceofWebbrowsingbasedonSCTP.ThefirstjobsuccessfullyavoidHOL,SYNfloodingattackintraditionalTCP—ba
7、sedWebbrowsing.Secondly,IdesignandimplementaschemetousingprioritizedSCTPstreamsforWebbrowsing.HowervethemultithreadingWebbrowsingbasedonSCTPwillcausedatainterleaving,whichcoulddelayofuserwaitingwhenlowend-t
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